Boiler



(No Model.) 2 sheets-sheen 1.

C. D. DODGE. BOILBR APPLIANGE.

No. 435,214. Pat nted @u .26 1890.

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2 sheets-sheet 2.

(Nro Model.)

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UNITED STATES PATENT OFFICE.

CHARLES D. DODGE, OF LANSING, MICHIGAN.

BOILER APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 435,214, dated August 26, 1890.

Application filed March 14, 1890. Serial No. 343,860. (No model.)

To all whom, t may concern.-

Be it known that I, CHARLES D. DODGE, of Lansing, county of Ingham, and State of Michigan, have invented certain new and useful Improvements in Boiler Appliances, of which the following is a specication, reference being had to the accompanying drawin ots.

Flhe object of my invention is to provide, in combination with a mud-drum of peculiar constructiommcans for heating the feed-Water as it is supplied to the boiler by utilizing the heat of the usual discharge through the mud-drum,which would otherwise be allowed to go to Waste.

Another object is to provide improved means for collecting the scum and filth of a boiler, by which the water in the boiler is kept more thoroughly cleansed than by ordinary means.

Another object is to provide, in combination'with the scum-collecting device, means for loosening and disintegrating the scale in the boiler by means of a galvanic pair, whose electrolytic iiuid is the water contained in the boiler itself.

Another objectis to provide, in combination with the galvanicv element, a whistle-indicator of the depth of the water in the boiler.

In the accompanying drawings, Figure 1 is a perspective of my improvements and an ordinary boiler, partly in section, combined. Fig. 2 is a central vertical section of the drum. Fig. 3 is a detached view of the galvanic collar; Fig. 4, a horizontal section of the same, and Fig. 5 a detached view'of the collapsible funnel-shaped pipe-mouth.

Referring to the letters upon the drawings, A indicates a steam-boiler of any ordinary construction, which may bepincased in brick, as shown in the drawings, or may be mounted in any usual way.

B indicates a feed-pipe, which may be connected with a feed-Water injector in the ordinary way. The injector is not shown in the drawings, because it forms no part of my invention and is the usual appliance for supplying water to boilers.

C indicates a valve for closing the pipe B.

D indicates a branch pipe communicating at one end with the pipe B and at the other with a nest of coiled pipe (preferably copper) or worm E, which is incased in the drum F.

G indicates a pipe leading from the top of the worm to the pipe H, which communicates with the boiler by outlet-nozzles J, located in the back of the boiler beneath the water-line and opening, as illustrated, so as to direct the flow of water from them toward the fore part of the boiler.

K indicates a valve for closing the pipe D, and-L indicates avalve for closing the pipe G. M indicates a pipe opened at one end into the pipe H and at the other into the drum F. N indicates a valve for closing the pipe M, and O a check-valve of ordinary construction for preventing the discharge of water from the supply-pipe into the drum. i

P indicates collapsible funnel-shaped openings or mouths secured by flexible joints Q to branches of thepipe R on opposite sides of the boiler and communicating, through the pipe R, with the interior of the drum F.

a indicates a iiexible piece of metal eX- tending across each of the funnel-shaped mouths P at their widest part.

h indicates a screw-threaded rod passing through the piece d and through the side of the mouth P.

c indicates a nut, and d a thumb-nut, screwed upon opposite ends of the rod b. By turning these nuts upon the screw the piece a will be drawn toward the side of the mouth P and will tend to close or collapse it. By this means the size of the mouth can be regulated at will. These mouths are intended to have their lower parts immersed beneath the surface of the water in the boiler and face toward the fore part of the boiler. They are connected by iiexible joints to the pipe, in order that they may be lifted ordepressed by the raising or lowering of the water in the boiler.

S indicates a valve for controlling the discharge of water through the pipe R.

T indicates a sieve in the bottom of the drum F, which separates the interior of the drum from the reservoir U, secured beneath it. The bottom of the drum is preferably lined with'zinc. y

V indicates a discharge-pipe communicating with the bottom of the reservoir II and con- IOC trolled by the valve W. Around the perpendicular part of the pipe H within the boiler is loosely secured a split collar X. The halves of this collar are made of different metals-for instance, copper and zincwhich possess the quality of producing, in combination with a liquid, galvanic action. It is also desirable to select those metals which, while they afford galvanic action, oppose the least frictional resistance to movement upon the pipe which they encircle.

In Fig. 4t isa cross-section of the galvanic element, showing the place of separation. The galvanic action necessary to produce the desired results need not be great, and the ordinary heated water in the boiler, circulating between the parts of the split collar, will usually be sufficient to produce it but more energetic action may be incited by infusing into the boiler a chemical possessing greater electrolytic properties. Pivoted to this collar so as to swing horizontally is a pair of arms Y. Secured between these arms to both of them or either of them is afloat Z, of any desired construction, which should be so regulated as to be able to sustain the weight of the collarand the weight of the arms.

A indicates a rod for regulating the angle of divergence between the arms Y. The points of these arms epter the funnel-shaped mouths P, so that the raising or lowering of them by means of the ioat attached to them lifts or depresses the mouths and keeps them in proper relations to the surface of the water.

B indicates an ordin ary steam-whistle connected in the ordinary way with they interior ofthe boiler by means of the dome D and pipe E.

F indicates a rod connected at one end with the collar X and adapted to move vertically with the packing-box G. The outer end of the rod Fis connected by a wire, cord, or any convenient means with the valve of the whistle, so that the dropping of the rod below a danger-point will cause the whistle to blow.

The operation of my invention is as follows:

The valve() being closed, water is supplied through the supply-pipe B, the branch pipe D, the worm E, and the pipe H, into the boiler. There, through the nozzles J, it is directed in a current toward the iioat of the boiler. The current thus established augments the circulation within the boiler, which ordinarily is excited by the lire in the furnace, and which is in this case directed toward the electric element X, where the water is subjected to the electric action, and the tendency to deposit scale is thereby prevented. The collar X, with the'arms attached to it, and the funnelshaped mouths, which are controlled by the arms, are raised and lowered by the raising and lowering of the waterin the boiler. Whatever the height of the water-line the funnelshaped mouths are constantly immersed to a certain depth below the water. When the operation of the machine is commenced, the

valve W should be opened, when the pressure of the steam in the boiler will force the water through the pipe R into the drum F. The valve XV should be gradually closed until the drum is filled, when the Valve N should be opened and the valve W completely closed. The water from the boiler that is passed into the drum around the coiled pipe will be hot and will tend to heat the feed-water. The discharge 0f the feed-water into the pipe H will produce suction upon the check-valve O to open it and draw the water from the drum F; but, as already explained, the temperature in the drum is being constantly lowered below that of the water in the boiler, so that a current is established between the water in the boiler and the drum, and partly by the force of this current and that of the suction in the pipe H a current will be kept up through the pipe M into the pipe H and thence into the boiler. It will be understood from this description that the operation of the device is continuous, so that the drum is always kept full of water and within reach of the pipe M. The water that comes from the boiler into the drum is impregnated with impurities; but upon being discharged into the drum, the impurities will be precipitated to the bottom below the perforated partition into the reservoir U, from which they may be blown out at any time by opening the Valve W. By means of this device a cleansing operation of the water in the boiler is kept up and the feedwater is discharged into the boiler in a heated condition.

The operation of the indicator needs but little description. When the water in the boiler falls below a certain danger-point, the collar X, dropping with it by means of its connections, opens the valve of the steam-whistle and causes it to blow continuously until the water-line is again raised so as to lift the collar X and allow the Valve of the whistle to close.

I am aware that indicators operated by a float and a whistle are not new, and that a galvanic element whose Iiuid is the water within the boiler is old.

What I claim is- 1. The combination,with a boiler, of a'nest of coiled pipes communicating with the boiler and adapted to communicate with the feedwater supply of the boiler, a drum surrounding. the coiled pipe, the pipe R, connecting the drum with the water in the boiler, and a check-controlled pipe connecting the drum with the supply-pipe of the boiler between .the coiled pipe and the boiler, for the purpose of establishing a circuit of water between the boiler, through the drum, and back again, substantially as set forth.

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2. The combination, with the boiler and a A drum provided with a reservoir beneath it anda perforated separating-partition between it and the reservoir, of a pipe connecting theinterior of the boiler with the interior of the drum and provided on its end within the boiler with adjustable funnel-shaped mouths 4. In a boiler the combination, with the open-- ings of the supply-pipe of the boiler, located in rear of the boiler, of a movable galvanic element in front of said discharge-openings, a float connected with said element for raising and lowering it by the raising and lowering of the Water in the boiler, a whistle, and a connection between the movable element and the valve of the Whistle, substantially as set forth.

5. The combination, with the boiler and its supply-pipe,of a drum adapted to collect and discharge impurities from the Water in the boiler, a pipe connecting the interior of the drum With the interior of the boiler, provided on its ends Within the boiler with flexiblyjointed funnel-shaped mouths, a collar adapted to move vertically upon a part of the supply-pipe, arms pivotally connected at one end to the collar and engaging at the other end With the flexibly-jointed mouths, and. a float secured to said arms, as and for the purpose Set forth.

In testimony of all which I have hereunto subscribed my name.

CHARLES D. DOlDGrE. V

Witnesses:

JAMES A. PARK, DEAN PARK. 

